Improvement in steam-engines



ment gear.

tuttli v@ft-atta @tutti admite."

WILLIAM INGLIS, OF BOLTON, AND JOHN FREDERICK SPENCER, OF LONDON, ENGLAND.

Letters Patent N 107,265, (lated September 13, 1870.

IMPROVEMENT IN' STEAM-ENGINES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it `known that we, WILLIAM Isaias, of Bol ton, Lancashire, England, and yJonx FREDERICK SPENCER, of London, England, have invented a new and useful Improvement in Steam-Engines; and we Figure 2 is a sectional view ot a compound or high `and low-pressure engine, showing one arrangement for the application ot' theseparate cylindrical valves. Figures 3 and 4 are lateral and transverse sectional views of one arrangement of our improved escape- In iigs. 1 and 2, merely the cylinders with their irmnediate connections are shown, and repetitions ot' some similar parts are indicated by lines.

The same reference numerals are nscdto mark the same or like parts in all the figures in which they eccur.

In this modification the small high-pressure cylinder 1, and large low-pressure cylinder 2 are placed side by side, with their pistons connected to cranks, which are diamctrically opposite, or ncarly so, but `.which are not shown in the drawing.

lhere are six cylindrical valve-chambers, cach with its valve, and they are placed with their axes parallel to cach other, and at right angles to the plane passing through thc axis ot' the cylinders.

Iwo of the valves, 3 3, are between the cylinders 1 2, and control the passage of the steam from the small one 1 to the large one 2, while other two, 4 4, for admitting steam, arc on the outer side of the small cylinder 1, the remaining two, 5 5, for the exhaust, lacing on the out-er sido ofthe large cylinder 2.

`rUhc valves 3 4 5 and their chambers are arranged and fitted like those ot' thc same kind in single-cylindcr engines, as will be easily understood from the drawing, and thc cylinders are represented as st-ca'n'ijacketed, and as put together in the manner dc'- scribcd in the specification of certain Lett-ers Patent granted to WILLIAM Ixcms, and dated December 22, 1868, No. 85,098.

All six valves may be worked in any convenientw ay,vas, for example, by a single vibrating disk; or 'the four valves, in connection with either of the cylinders, may be worked by a separate disk or rockingshalt. l

In either arrangement,adjustable liberating gear, such as is used in single engines of the same class, lnay be applied to the -high-pressure valves 4, for et'- fecting the cut-od.

f In iigs. 1 and 2, two vibrating disks,6 7, are employed, one, 6, being carried on a stud projecting from the large cylinder 2, and acting by means Qt' plain connecting-rods, indicated by lines 8, in g 1, on levers ou the ends of the spindles 9 of the four valves 3 3 5'5 appertaining to that cylinder. l

The other vibrating disk, 7, is carried-on a stud projecting from the high-pressure cylinder 1, and acts by connecting-rods l0, connected with liberating gear on thc spindles H of the two high-'pressure valves 4 4.

In most cases it will' be better to impart the vibrating motion to thc disks 6 7 from separate eccentrics on the crank-shaft, but in some cases they may be connected together', or be otherwise arranged to be actuated by a single eccentric, or by a single pair ot" ecccntrics.

'lhe motion may be transmitted from the cccentrics tothe disks in any convenient manner.

In the improvement in tripping-gear there are for cach steam-valve a disk and ring, both placed to vibrate concentrically to the axis of' they steam-valve spindle, or to the axis of a weigh-shaft giving motion to the steam-valve. Ono of these devices, 'that is, 'ring and disk, is permanently secured and connected with thc usual eccentric and its rods, and the other is permanently connected to the steam-valve rod, or to the axis of a weigh-shaft giving motion to the steamvalvc, and also to the spring or weight, or their equivalent, which closes the steam-valve, and both ring and disk are connected together and disengaged at the intervals of time necessary to regulate the cntotf or expansion by detent or escapemcnt gear.

liigs. 3 and 4 show the arrangement.- ot' the radial gear.Y

L is a ring, which is connected with wrist-plate by means ot' the rod 10, which is pivoted to said ring at M.

E is a disk, provided with a vertical annular projection, E, which'tit-s within the ring L, and is divided or slotted radially on one or two sides.

A pin, d, projects from the upper side of the disk,

and works in a slot of a radially-arrangcd lockingba-r d".

'Ihis bar .is cut out at its lmiddle third to admit the cam '1 of the shaft H;

An annular spring, F, is arranged to exert a constant pressure outwardly on the bar d.

c e c indicate blocks or pieces of metal, the. two

outer of which are secured respectively to the ring and disk by screws. l The disk E" is keyed on the valve-spindle, and is connected by the pin S and rod 1S to thedash-pot 15, which, in this instance, contains the spring for closing the valves when liberated.v

lhe ring L and disk E are intern'littently connected by the locking-bar d" and thc cam or trigger l, which last is held stationary by the adjustable rod lil.

The movement of the rino' L in the direction oi" when they arc brought to coincide by the return movement ot' the latter by spring l, The two disks then move together in opening the valve.

Other modifications of the detcut gear may `be adopted without affecting the principle of the radial action of the two distinct parts E and L.

The expansion can be varied by changing the posiclause, of the wrist-plate or plates,'dashpot, and vadjustablc stationary rod 1l), all arranged to operate as 1 shown and described.

3. rlhe arrangement of the valves 3 3, 4 4, and 5 5, with the high-pressure cylinder 1 and low-pressure cylinder 2, as shown and described, whereby the pistons ot' thc said cylinders move simultaneously in reverse directions, as shown and described.

Theabove specification ot' our invention signed by 11s-this 15th day of November, 1869.

WILLIAM INGLIS. JOHN FREDERICK SPENCER. Witnesses to the signature of WILLIAM INGms:

Joux JACKSON, War/reu HAnDcAsTLE. VWitnesses to the signature of Joux FREDERICK Srnxcnn:

Guo. J. I5. FRANKLIN, JOHN GYNNE. 

